Technical Security
API security
Every interface between systems, tested — not just the ones with public documentation.
Who this is for
- Companies whose product is largely API-driven, including B2B platforms exposing APIs to customers directly
- Teams that have grown their API surface faster than their review process for it
- Organizations integrating with third-party APIs and unsure what data exposure that creates
What this addresses
- Authorization checks exist inconsistently across endpoints, so some routes are more exposed than others
- Internal or partner-facing APIs were never designed with the same scrutiny as the public product
- Nobody has an accurate inventory of every API the company exposes or depends on
Our approach
We start by building an accurate map of the API surface — including internal and partner-facing endpoints that often get missed — before testing anything.
Testing focuses on the failure modes that actually matter for APIs: broken object-level authorization, excessive data exposure, and inconsistent authentication across endpoints.
Findings are tied to specific endpoints and data flows so engineering can fix them without re-deriving the context.
Every engagement follows the same six-step methodology — see our approach.
What to expect
Scope depends on the size of the API surface and whether documentation (like an OpenAPI spec) already exists — an undocumented API takes longer to map before testing can begin.
Frequently asked
Do we need an OpenAPI/Swagger spec for this?
It speeds things up but isn't required — undocumented APIs can be mapped through traffic analysis and testing, it just takes longer.
How is this different from application security review?
API security focuses specifically on the interfaces between systems — auth, authorization, data exposure across endpoints — while application security also covers the broader codebase, UI layer, and dependencies. They're often scoped together.
Not sure what your actual API surface looks like?
That's a common starting point — tell us what you know and we'll help map the rest.